package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常访问
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id){
        return "线程池：" + Thread.currentThread().getName() + " paymentInfo_OK,id: " + id + "\t" + "O(∩_∩)O哈哈~";
    }


    /**
     * 正常访问
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id){

        int timeNumber = 13000;
//        int age = 10/0;
        try{
            TimeUnit.MILLISECONDS.sleep(timeNumber);
        }catch (InterruptedException e){
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + " paymentInfo_TimeOut,id: " + id + "\t" + "O(∩_∩)O哈哈~" + " 耗时"+timeNumber+"s";
    }

    public String paymentInfo_TimeOutHandler(Integer id){

        return "线程池：" + Thread.currentThread().getName() + " 系统繁忙或运行报错 ,id: " + id + "\t" + "o(╥﹏╥)o";
    }

    //======服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"), //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"), //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"), //时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60") //失败率达到多少后跳闸（10s中超过60%就触发熔断器）
    })
    public String paymentCircuitBreaker(@PathVariable("id")Integer id){

        if (id < 0){
            throw new RuntimeException("*****id 不能为负数");
        }

        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t" + "调用成功，流水号" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id")Integer id){
        return "id 不能为负数，请稍后再试，ε=(´ο｀*))) id: " + id;
    }

}
